End structure for tubular motor and tubular motor

Abstract

The application relates to an end structure applied to a tubular motor and the tubular motor. The end structure applied to the tubular motor comprises a fixing base, the fixing base is provided with a first driving cavity and a drainage cavity communicated with the first driving cavity, a rotating ring, the rotating ring is sleeved on the fixing base and opposite to the first driving cavity, a driving rack is arranged on the inner wall of the rotating ring, and a driven shaft, one end of the driven shaft penetrates through the fixing base and is engaged with the driving rack in the first driving cavity through a driving gear. The scheme provided by the application can effectively prevent external liquid from being retained and invading the inside of the motor, thereby effectively improving the working reliability and service life of the motor in a humid environment.

Description

Technical Field

[0001] This application relates to the field of tubular motor technology, and more particularly to end structures applied to tubular motors and tubular motors. Background Technology

[0002] Tubular motors are widely used as drive mechanisms in various smart home and commercial facilities due to their compact structure and ease of concealed installation, such as motorized roller blinds, projection screens, and smart skylights. To accurately control the lifting and lowering stroke and limit positions of roller blinds and screens, a stroke detection component is usually integrated into the end of the tubular motor. This component uses the motion signal of a rotating ring that moves synchronously with the output shaft of the tubular motor to calculate the drive stroke of the tubular motor.

[0003] In related technologies, the end structure of tubular motors requires the rotating ring to mesh with the internal drive gear to achieve stroke measurement. The meshing part inevitably has assembly gaps, which means that in humid environments such as kitchens, bathrooms, basements, and warehouses, or when directly applied to outdoor skylights, carports, and other places prone to rain and splashing, water vapor, condensate, or directly splashed liquids can easily seep into the interior of the tubular motor through the aforementioned gaps, affecting the reliability and service life of the tubular motor. Utility Model Content

[0004] To solve or partially solve the problems existing in the related technologies, this application provides an end structure for a tubular motor and a tubular motor, which can effectively prevent external liquid from accumulating and intruding into the motor, thereby effectively improving the reliability and service life of the motor in humid environments.

[0005] The first aspect of this application provides an end structure for use in a tubular motor, comprising: A fixed base; the fixed base has a first driving cavity and a drainage cavity communicating with the first driving cavity; A rotating ring; the rotating ring is sleeved on the fixed base and faces the first driving cavity; a driving rack is provided on the inner wall of the rotating ring; and Driven shaft; one end of the driven shaft passes through the fixed seat and meshes with the drive rack through the drive gear in the first drive cavity.

[0006] In some embodiments, the fixing base has a connecting cavity along a direction parallel to its axis and a fixing member passing through the drainage cavity to the connecting cavity.

[0007] In some embodiments, the fixing seat is further provided with a first waterproof rubber ring sleeved on the fixing member; the first waterproof rubber ring is located between the connecting protrusion and the cavity wall of the connecting cavity.

[0008] In some embodiments, the fixed base has a second driving cavity along a direction parallel to the connecting cavity; the driven shaft passes through the second driving cavity into the first driving cavity.

[0009] In some embodiments, the mounting base is further provided with a second waterproof rubber ring sleeved on the driven shaft; the second waterproof rubber ring is located between the shaft wall of the driven shaft and the cavity wall of the second drive cavity.

[0010] In some embodiments, the port of the mounting base is further provided with an annular groove for mounting the motor housing around the axis; the outer wall of the annular groove is fitted with a third waterproof rubber ring.

[0011] In some embodiments, the mounting base is further provided with a wire passage, and a wire passage seal is provided in the wire passage.

[0012] In some embodiments, the end structure further includes: a mounting base; one end of the mounting base is provided with a mounting protrusion; The mounting base has an installation cavity, and the installation protrusion is disposed in the installation cavity; wherein, the installation cavity is in communication with the drainage cavity.

[0013] In some embodiments, the drainage cavity is arranged along the axial direction of the fixed base; the diameter of the drainage cavity gradually increases in the direction away from the driven shaft.

[0014] The second aspect of this application provides a tubular motor, including: a housing, a control component, a drive motor, a drive shaft assembly, and the end structure described in the first aspect of this application; The housing has an accommodating space; the control component and the drive motor are disposed in the accommodating space along the extension direction of the housing, and the control component is electrically connected to the drive motor; the drive shaft assembly and the end structure are respectively disposed at both ends of the housing, the drive motor is drivenly connected to the drive shaft assembly, and one end of the control component is located on one side of the driven shaft and detects the rotational stroke of the driven shaft.

[0015] The technical solution provided in this application may include the following beneficial effects: The technical solution of this application provides a first driving cavity and a drainage cavity connected to the first driving cavity in the fixed seat. This creates a relatively independent sealed space for the meshing transmission between the rotating ring and the driven shaft. It can also effectively drain liquid that seeps into the gap between the rotating ring and the fixed seat from the drainage cavity in a timely manner, thereby effectively preventing external liquid from accumulating and invading the motor. This effectively improves the working reliability and service life of the motor using the end mechanism of this application in humid environments.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0017] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0018] Figure 1 This is a schematic diagram of the end structure applied to a tubular motor, as shown in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a tubular motor shown in an embodiment of this application.

[0019] Reference numerals: 100, end structure; 101, fixed base; 1011, first drive cavity; 1012, drainage cavity; 1013, connecting cavity; 1014, fixing member; 1015, first waterproof rubber ring; 1016, second drive cavity; 1017, second waterproof rubber ring; 1018, mounting annular groove; 10181, third waterproof rubber ring; 1019, wire passage; 10191, wire passage seal; 10110, mounting cavity; 102, rotating ring; 1021, drive rack; 103, driven shaft; 1031, drive gear; 104, mounting base; 1041, mounting protrusion; 200, housing; 300, control assembly; 400, drive motor; 500, drive shaft assembly. Detailed Implementation

[0020] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0021] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0022] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0023] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] In related technologies, the end structure of tubular motors requires the rotating ring to mesh with the internal drive gear to achieve stroke measurement. The meshing part inevitably has assembly gaps, which means that in humid environments such as kitchens, bathrooms, basements, and warehouses, or when directly applied to outdoor skylights, carports, and other places prone to rain and splashing, water vapor, condensate, or directly splashed liquids can easily seep into the interior of the tubular motor through the aforementioned gaps, affecting the reliability and service life of the tubular motor.

[0025] To address the aforementioned issues, this application provides an end structure for a tubular motor that effectively prevents external liquids from accumulating and intruding into the motor, thereby significantly improving the motor's reliability and lifespan in humid environments.

[0026] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the end structure applied to a tubular motor, as shown in an embodiment of this application.

[0028] See Figure 1 The end structure 100 of this application applied to a tubular motor includes a fixed base 101, a rotating ring 102, and a driven shaft 103.

[0029] The fixed base 101 has a first driving cavity 1011 and a drainage cavity 1012 communicating with the first driving cavity 1011. A rotating ring 102 is sleeved on the fixed base 101 and is opposite to the first driving cavity 1011. A driving rack 1021 is provided on the inner wall of the rotating ring 102. After one end of the driven shaft 103 passes through the fixed base 101, it is located in the first driving cavity 1011 and meshes with the driving rack 1021 through a driving gear 1031.

[0030] The first driving cavity 1011 has a receiving portion, which can be a cylindrical cavity structure. The driving gear 1031 is disposed in the receiving portion of the first driving cavity 1011. The shape of the receiving portion is matched with that of the driving gear 1031 by means of the cavity structure. The drainage cavity 1012 is connected to the bottom surface of the first driving cavity 1011 through an opening.

[0031] Furthermore, the first driving cavity 1011 may also be provided with a limiting part distributed circumferentially along the outer wall of the fixed base 101, wherein the driving rack 1021 of the rotating ring 102 is embedded in the limiting part, thereby limiting the rotating ring 102 and further reducing the gap between the rotating ring 102 and the fixed base 101. It can be understood that when the driving gear 1031 of the rotating ring 102 is embedded in the limiting part, the first driving cavity 1011 as a whole constitutes a closed space for accommodating the meshing action of the driving gear 1031 and the driving rack 1021.

[0032] The drive rack 1021 can be a straight rack structure that matches the module of the drive gear 1031. The rack length of the drive rack 1021 covers the stroke range of the rotating ring 102, that is, the inner wall of the rotating ring 102 fully covers the drive rack 1021.

[0033] In this design, the end of the driven shaft 103 furthest from the rotating ring 102 is coupled with a Hall sensor to detect the travel of the rotating ring 102. It should be understood that a Hall sensor is a magnetic induction element that calculates travel by detecting the number of rotations of the driven shaft. As an example, a non-contact magnetic encoder can be installed at the end of the driven shaft 103 corresponding to the Hall sensor. By having the non-contact magnetic encoder rotate coaxially with the driven shaft 103, a gap is maintained between the Hall sensor and the end of the driven shaft 103, simultaneously calculating the rotational travel.

[0034] When the end structure of the tubular motor of this application is in operation, the rotating ring 102 is sleeved on the outside of the fixed base 101. The drive rack 1021 and the drive gear 1031 set on the inner wall of the rotating ring 102 form a closed meshing area in the first drive cavity 1011. When the rotating ring 102 is driven by the outside to rotate, the drive gear 1031 rotates and drives the driven shaft 103 to rotate. The number of rotations is transmitted to the Hall sensor through an encoder at one end of the driven shaft 103 on the outside of the fixed base 101, thereby realizing the stroke detection function of the rotating ring 102. When the rotating ring 102 rotates, when the external liquid seeps in through the assembly gap between the rotating ring 102 and the fixed base 101, the seeped liquid enters the first drive cavity 1011 and is discharged outward from the drain cavity 1012 which is connected to the bottom of the first drive cavity 1011.

[0035] In some embodiments, the mounting base 101 has a connecting cavity 1013 and a fixing member 1014 passing through the drain cavity 1012 into the connecting cavity 1013 along a direction parallel to its axis. The connecting cavity 1013 can be cylindrical or rectangular through-hole. The connecting cavity 1013 can be used for assembly and connection with a control component inside the motor, wherein one end of the control component can be provided with a connecting protrusion matching the shape of the connecting cavity 1013. By having the connecting protrusion disposed within the connecting cavity 1013 and connected by the fixing member passing through the drain cavity 1012 into the connecting cavity 1013, the assembly between the mounting base 101 and the control component inside the motor is achieved, and the radial displacement of the control component is limited by axial positioning.

[0036] The fastener can be a screw or bolt. Of course, the fastener 1014 can also be other fastening elements that can penetrate through the drain cavity 1012 and the connecting cavity 1013, which is not limited here. By using the fastener to lock and fix the connecting protrusion through the drain cavity 1012 into the connecting cavity 1013, the connection interface between the fixed seat 101 and the control components inside the motor can be physically isolated from the external environment.

[0037] In some embodiments, the fixing base 101 is further provided with a first waterproof rubber ring 1015 sleeved on the fixing member 1014, wherein the first waterproof rubber ring 1015 is located between the connecting protrusion of the control component and the cavity wall of the connecting cavity 1013. The first waterproof rubber ring 1015 can be an annular seal made of an elastic material, such as rubber or silicone. It should be understood that the inner diameter of the first waterproof rubber ring 1015 matches the outer diameter of the fixing member 1014 to form an interference fit. The first waterproof rubber ring 1015 can radially compress and wrap around the outer surface of the fixing member 1014, thereby effectively preventing liquid from axially penetrating from the drainage cavity 1012 along the assembly gap of the fixing member 1014 into the connecting cavity 1013, further improving the waterproof performance of the end structure of this application.

[0038] In some embodiments, the fixed base 101 has a second driving cavity 1016 along the direction parallel to the connecting cavity 1013, wherein the driven shaft 103 passes through the second driving cavity 1016 into the first driving cavity 1011. The second driving cavity 1016 is a through cavity extending along the interior of the fixed base 101 in a direction parallel to the axis of the connecting cavity 1013.

[0039] Furthermore, the second driving cavity 1016 can have a stepped channel structure, with its inner diameter forming a clearance fit with the outer diameter of the driven shaft 103. This structure effectively restricts the axial movement of the driven shaft 103, thus confining its transmission path to the fixed seat 101. Even further, the bottom of the second driving cavity 1016 is relatively higher than the bottom of the first driving cavity 1011, creating a height difference between the two chambers. This height difference effectively further prevents liquid from entering the second driving cavity 1016 from the first driving cavity 1011.

[0040] In some embodiments, the fixed base 101 is further provided with a second waterproof rubber ring 1017 sleeved on the driven shaft 103, wherein the second waterproof rubber ring 1017 is located between the shaft wall of the driven shaft 103 and the cavity wall of the second drive cavity 1016. The second waterproof rubber ring 1017 may be made of the same material as the first waterproof rubber ring 1015; the material and function of the second waterproof rubber ring 1017 will not be elaborated here. When the driven shaft 103 rotates within the second drive cavity 1016, the second waterproof rubber ring 1017 sleeved on its exterior generates radial pressure due to elastic deformation, continuously covering the annular gap between the shaft wall of the driven shaft 103 and the cavity wall of the second drive cavity 1016, thereby forming a sealing interface. This allows the driven shaft 103 to rotate freely when the detection rotating ring 102 travels, while simultaneously, the adaptive compressibility of the elastic material effectively prevents external liquid from penetrating axially along the first drive cavity 1011 into the second drive cavity 1016.

[0041] In some embodiments, the port of the mounting base 101 is further provided with a mounting annular groove 1018 for mounting the motor housing in the axial direction. The mounting annular groove 1018 is an annular recessed structure extending axially around the port of the mounting base 101, and the motor housing is fitted onto the mounting annular groove 1018 to form an assembly fit. A third waterproof rubber ring 10181 is fitted onto the outer wall of the mounting annular groove 1018. The third waterproof rubber ring 10181 can be made of the same material as the first waterproof rubber ring 1015; the material and function of the third waterproof rubber ring 10181 will not be described further here.

[0042] It is understood that the mounting base 101 provides an axial positioning mounting reference for the motor housing through the annular recess structure formed by the mounting annular groove 1018. When the end of the motor housing is embedded in the mounting annular groove 1018, the third waterproof rubber ring 10181 is subjected to radial compression from the motor housing and the outer wall of the mounting annular groove 1018, resulting in elastic deformation. This forms a continuous sealing interface around the connection between the mounting base port and the motor housing. This sealing interface then blocks external liquid from penetrating into the motor through the assembly gap between the motor housing and the mounting base 101, further ensuring the waterproof performance of the end structure of this application.

[0043] In some embodiments, the mounting base 101 is further provided with a wire passage 1019, and a wire passage seal 10191 is provided within the wire passage 1019. The wire passage seal 10191 is a sealing element with elastic deformation capability, and can be made of silicone or rubber. When the control circuit is introduced into the motor from the outside, the control circuit passes through the wire passage seal 10191 in the wire passage 1019 and enters the motor. At this time, the wire passage seal 10191 is compressed and undergoes radial expansion, thus tightly adhering to the outer surface of the circuit and the inner wall of the wire passage 1019. This effectively prevents external liquids or moisture from entering the motor along the circuit direction while maintaining the free passage of the circuit, further improving the waterproof performance of the end structure of this application.

[0044] In some embodiments, the end structure of this application includes a mounting base 104. The mounting base 104 is used for fixed installation to a preset position or cavity, thereby enabling the tubular motor using the end structure of this application to be fixedly installed. One end of the mounting base 104 is provided with a mounting protrusion 1041, and the fixing base 101 has a mounting cavity 10110. The mounting protrusion 1041 is fixedly disposed in the mounting cavity 10110, achieving an assembly connection between the fixing base 101 and the mounting base 104. The mounting cavity 10110 communicates with the drainage cavity 1012. After the mounting protrusion 1041 is embedded in the mounting cavity 10110, there is still an assembly gap between the mounting protrusion 1041 and the mounting cavity 10110. When the drainage cavity 1012 contains liquid, the liquid in the drainage cavity 1012 can be discharged through the assembly gap between the mounting protrusion 1041 and the mounting cavity 10110, thereby effectively preventing water from remaining in the drainage cavity 1012 for a long time and achieving active drainage of seepage liquid.

[0045] In some embodiments, the drainage cavity 1012 is arranged along the axial direction of the fixed base, wherein the diameter of the drainage cavity 1012 gradually increases in the direction away from the driven shaft 103. That is, the cross-sectional dimension of the drainage cavity 1012 gradually expands outward from the end near the driven shaft 103, forming a gradually expanding flow channel. For example, the drainage cavity 1012 adopts an inverted conical hole structure. Through the drainage cavity with the above structure, the liquid flows along the drainage cavity 1012 away from the driven shaft 103 under the action of gravity or external pressure, ensuring the drainage effect of the infiltrated liquid and constraining the direction of liquid drainage.

[0046] In this embodiment, the end structure of this application provides a first driving cavity and a drainage cavity connected to the first driving cavity in the fixed seat, which are relatively independent sealed spaces for the meshing transmission between the rotating ring and the driven shaft. It can effectively drain the liquid that seeps in from the gap between the rotating ring and the fixed seat from the drainage cavity in a timely manner, thereby effectively preventing external liquid from accumulating and invading the motor. This effectively improves the working reliability and service life of the motor using the end mechanism of this application in humid environments.

[0047] Corresponding to the aforementioned embodiment of the end structure of the tubular motor, this application also provides a tubular motor and corresponding embodiments.

[0048] Figure 2 This is a schematic diagram of the structure of a tubular motor shown in an embodiment of this application.

[0049] See also Figure 1 and Figure 2 The tubular motor of this application includes: a housing 200, a control component 300, a drive motor 400, a drive shaft assembly 500, and an end structure 100 as described in the previous embodiment.

[0050] The housing 200 has an accommodating space. The control component 300 and the drive motor 400 are arranged in the accommodating space along the extension direction of the housing 200. The control component 300 is electrically connected to the drive motor 400. The drive shaft assembly 500 and the end structure 100 are respectively arranged at both ends of the housing 200, so that a sealed space is formed inside the housing 200. The drive motor 400 is drivenly connected to the drive shaft assembly 500. One end of the control component 300 is located on one side of the driven shaft 103 and detects the rotational stroke of the driven shaft 103.

[0051] The tubular motor of this application controls the operation of the drive motor 400 through the control component 300. The drive motor 400 drives the output shaft of the drive shaft assembly 500 to rotate, thereby realizing the driving function of the motor. The control component 300 detects the rotational stroke of the driven shaft 103 and can monitor the stroke signal fed back by the rotating ring 102, thereby realizing precise control of the rotational direction, rotational amplitude and rotational speed of the drive motor 400.

[0052] In this embodiment, the tubular motor of this application utilizes the waterproof performance of its end structure to effectively drain liquid that seeps into the gap between the rotating ring and the fixed seat from the drainage chamber in a timely manner, thereby effectively preventing external liquid from accumulating and intruding into the motor, thus effectively improving the motor's working reliability and service life in humid environments.

[0053] The solution of this application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to this application. Furthermore, it is understood that the steps in the method of this application embodiment can be adjusted, combined, and deleted according to actual needs, and the modules in the device of this application embodiment can be combined, divided, and deleted according to actual needs.

[0054] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An end structure for use in a tubular motor, characterized in that, include: A fixed base; the fixed base has a first driving cavity and a drainage cavity communicating with the first driving cavity; A rotating ring; the rotating ring is sleeved on the fixed base and is opposite to the first driving cavity; The inner wall of the rotating ring is provided with a drive rack; and Driven shaft; one end of the driven shaft passes through the fixed seat and meshes with the drive rack through the drive gear in the first drive cavity.

2. The end structure according to claim 1, characterized in that, The fixing base has a connecting cavity along a direction parallel to its axis and a fixing member that passes through the drainage cavity to the connecting cavity.

3. The end structure according to claim 2, characterized in that, The fixing seat is also provided with a first waterproof rubber ring sleeved on the fixing member; the first waterproof rubber ring is located between the connecting protrusion and the cavity wall of the connecting cavity.

4. The end structure according to claim 2, characterized in that, The fixed base has a second driving cavity along the direction parallel to the connecting cavity; the driven shaft passes through the second driving cavity into the first driving cavity.

5. The end structure according to claim 4, characterized in that, The mounting base is also provided with a second waterproof rubber ring sleeved on the driven shaft; the second waterproof rubber ring is located between the shaft wall of the driven shaft and the cavity wall of the second drive cavity.

6. The end structure according to claim 1, characterized in that, The port of the fixed base is also provided with an annular groove for mounting the motor housing around the axis; the outer wall of the annular groove is fitted with a third waterproof rubber ring.

7. The end structure according to claim 1, characterized in that, The mounting base is also provided with a wire passage, and a wire passage seal is provided in the wire passage.

8. The end structure according to claim 1, characterized in that, The end structure also includes: a mounting base; one end of the mounting base is provided with a mounting protrusion; The mounting base has an installation cavity, and the installation protrusion is disposed in the installation cavity; wherein, the installation cavity is in communication with the drainage cavity.

9. The end structure according to any one of claims 1 to 8, characterized in that, The drainage cavity is arranged along the axial direction of the fixed base; the diameter of the drainage cavity gradually increases in the direction away from the driven shaft.

10. A tubular motor, characterized in that, include: The housing, control assembly, drive motor, drive shaft assembly, and end structure as described in any one of claims 1 to 9; The housing has an accommodating space. The control component and the drive motor are disposed within the accommodating space along the extension direction of the housing, and the control component is electrically connected to the drive motor; the drive shaft assembly and the end structure are respectively disposed at both ends of the housing, the drive motor is drivenly connected to the drive shaft assembly, and one end of the control component is located on one side of the driven shaft and detects the rotational stroke of the driven shaft.

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